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Investment In and Advances to Unconsolidated Affiliates - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Aug. 31, 2018
Jul. 16, 2018
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]            
Other liabilities $ 0.0 $ 0.1        
Distributed earnings from equity investments $ 19.8 18.0 $ 15.6      
Miami Valley Gaming LLC            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage 50.00%         50.00%
Other liabilities $ 8.0          
Note payable term 6 years          
Secured note payable fixed interest rate 5.00%          
Distributed earnings from equity investments $ 18.8 $ 17.0 $ 15.0      
Ocean Downs and Racing Services            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage       100.00% 50.00%  
Saratoga Casino Holdings LLC            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage         25.00%  
Delaware North Companies Gaming & Entertainment Inc. | Miami Valley Gaming LLC            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage 50.00%